A Step-By-Step Guide To Rebuilding And Changing Your CVT Transmission Fluid

It can be challenging to maintain your car’s CVT transmission in good working order when it comes to changing and rebuilding its transmission fluid. By following our step-by-step guide, you can ensure your CVT transmission fluid change and is rebuilt safely for optimal performance.

Introduction to CVT Transmissions

A CVT, or continuously variable transmission, is a type of automatic transmission that uses a pulley and belt system to change gears without any interruptions in power. This allows for a more efficient use of engine power, resulting in better fuel economy.

CVTs are often found in smaller vehicles with limited space for a traditional automatic transmission. However, they are becoming increasingly common in larger vehicles as well. Many newer model cars and SUVs now come equipped with a CVT transmission.

If you’re considering rebuilding or changing your CVT transmission fluid, there are a few things you should know first. In this article, we’ll walk you through the process step-by-step so you can do it yourself with confidence.

Signs That Rebuild or Change CVT Transmission Fluid Is Necessary

When it comes to your CVT transmission, the best way to tell if the fluid needs to be changed is by looking for specific signs. Here are four signs that indicate you should rebuild or change your CVT transmission fluid:

1. Your car is hard to shift into gear – If you notice that it’s becoming increasingly difficult to shift your car into gear, this could be a sign that the CVT transmission fluid is dirty or low.

2. Your car feels like it’s slipping out of gear – If you feel like your car is slipping out of gear while driving, this is another sign that the CVT transmission fluid needs to be changed.

3. Your car makes grinding or whining noises when shifting – If you hear strange grinding or whining noises coming from your car when shifting gears, this could be a sign of a serious problem with the CVT transmission and should be addressed immediately.

4. Your check engine light is on – In some cases, the check engine light may come on if there’s a problem with the CVT transmission fluid. If you notice this light, it’s important to have your vehicle checked out as soon as possible.

Steps to Rebuild and Change CVT Transmission Fluid

CVT stands for continuously variable transmission and is a type of automatic transmission that uses a pulley and belt system to provide an infinite number of gear ratios. This means that the transmission can seamlessly change between gears, resulting in a smoother ride. 

CVT transmissions are increasingly becoming more popular in cars and trucks, but they can be expensive to maintain. One way to keep costs down is to rebuild and change the fluid yourself. Here are the steps you need to follow:

1. Remove the drain plug from the bottom of the transmission pan and drain the fluid into a catch basin.

2. Unbolt the torque converter from the flexplate and remove it from the transmission.

3. Remove the valve body from the transmission and disassemble it, cleaning all of the parts in a solvent bath. 

4. Inspect all of the parts for wear or damage and replace any worn or damaged parts. 

5. Reassemble the valve body and reinstall it in the transmission. 

6. Install a new torque converter on the flexplate and bolt it in place. 

7. Fill the transmission with new fluid through the dipstick tube until it reaches the full line on the dipstick. 

8. Reinstall the drain plug on the bottom of the transmission pan and torque it to specification. 

9. Start the engine and check for any leaks or other problems that could indicate a need for further maintenance. 

10. Test drive the vehicle to make sure everything is functioning properly.

Tools Needed for the Job

In order to rebuild or change your CVT transmission fluid, you will need the following tools:

-A socket set

-A ratchet

-An extension cord

-A drain pan

-A funnel

-CVT transmission fluid 

First, you will need to remove the drain plug from the bottom of the transmission using a socket and ratchet. Be sure to have your drain pan ready to catch any fluid that may come out. Once the plug is removed, allow all of the old fluid to drain out completely. 

Next, you will need to add new CVT transmission fluid. Using a funnel, add the new fluid through the dipstick tube until it reaches the “full” line on the dipstick. Once you have added enough fluid, replace the dipstick and screw in the fill plug. 

Start the engine and let it idle for a few minutes. Check for leaks and check the level of fluid again using the dipstick. If everything looks good, you’re done!

Tips for a Successful Rebuild or Change

1. Check your owner’s manual to see when your CVT transmission fluid should be changed. 

2. If your CVT transmission is due for a change, drain the old fluid and replace it with new fluid according to your manual’s specifications. 

3. Be sure to use the correct type of CVT transmission fluid for your vehicle. 

4. If you’re unsure about what type of CVT transmission fluid to use, consult a qualified technician or your local dealership service department. 

5. When changing your CVT transmission fluid, it’s also a good idea to check the condition of the filter and replace it if necessary. 

6. Follow all the steps in your owner’s manual carefully when changing your CVT transmission fluid to ensure optimal performance from your vehicle.


Changing your transmission fluid is an essential part of maintaining the longevity of your vehicle. With this step-by-step guide, you can now confidently rebuild and change your CVT transmission fluid without any specialist help. Keep in mind that while it may be possible to do it yourself if you’re not sure or feel uncomfortable doing so, contact a certified mechanic for assistance. Always remember to use the correct grade and type of oil recommended by the manufacturer when rebuilding and changing your CVT transmission fluid.